prahar



L. PRAHAR. PORTABLE ELECTR'FC UGHT.

APPLICATK'H FILED JULY 2%, i911.

Patentad June 24, mg.

To all whom it May concern LESTER 2mm 01. new Yo is. Y., j YORK, N. Y; 1

Assxenoa'ro LOUISE PRAEAR, or NEW ron'rsasm Emc'rnrc men'r.

' Be itknown that I, Iaes'rnn PRAHAR, a citi- 'z'en of-the United States, and a resident of New York city, in the county of New York @and State of NewYork, have invented cer- ':tain new and useful Improvements in Portable Electric Lights, of which the following is'a specification.

' 'I. L 'l his invention is a portable electric light so constructed that it may be worn n. the '"back of the hand or wrist and used primarily for signaling purposes, although tion of current is concerned forms no palpable of other uses. 'Ilhe parts are so ar- --ranged=and supported that the wearermay' 15 have full; freedom or use of hi's1'liand,,for

instance, in shifting gears, steering crap lying the emergency brake on an automoile and while the circuit of the electric light is broken. The wearer may makeor break the circuit of the light at will by a predetermined movement of the hand, such for instance, as would be natural croonvenient 1n indicating to a driver of a. car

' in the rear his intention of stoppingor turn-- 25 ing to-one sideor the other.

In its preferred embodiment, the light is energized by a small battery, the case of which serves as abase for the light so that the entire apparatus may be worn on the hand or wrist without attachment toany part carried by the car.

In the accompanying drawings, Figure 1- is an edge view of the device illustrated as clamped on the wrlst and with-the hand in' sucha position as to close the circuit;

- Specification oi mtters I'atenti- Patented June 24, 1919.

Application flled'l'uly 24, 1917. Serial in. 152,404.

- peripheral walls provided with a slotted Y flange 1,3 to which a strap 14 may be permanently connected. Adjacent to this point of attachment is a buckle 15 while the body of the strap extends across the bottom of the inner casing member 11 and through a corresponding and diametrically opposite slotted flange' 16. The'free end of the strap when attached tdthe buckle thus serves to .not only hold'the two parts of the casing together, but to fastenit on the wrist or in any other desired position.

lie-outer or top wall of the casing 10 carries a smallelectric li ht 17. This may be of a. form commercia y used in connection with small pocket flash lights and may have a threaded stem 18"screwed into the .casing wall and terminating ina central contact member. 'IJhe battery may be provided 'with' a-suitable spring contact member lflwith whichpthe contact of the light will'engage when-the two parts of the easingare ut together. The casing of the batter "ing, of insulating material or out with such material, prevents the fiow {of -current through the light until the other terminal'ofthe battery is grounded on the One end of the battery is provided with a spring contact member 20 and the Fig. 2 -is a transverse section-taken for ins end wallof one of the casing members, for

stance on the line 22 of Fig. 3 and mercial form of a size adapted for ltlie'pur pose. In Fig. 2 I have not attempted to illustrate any of the'plates or internal mechanism of the battery in the cross section there shown as said battery so far as the generation of my invention The two parts 10 and 11 of the casing may be secured together in various differentways. Merely as an example, I have shown them each provided with a peripheral wall and the two walls arrangedto telescope. Variinstance, the inner one may have a push button or any other suitable circuit closing device. This is shown as a plunger 21 normally held in outer position b a coil spring and adapted to engagewith t 1e spring contact 20 and close the circuit when pressed inwardly. As any important feature of my I invention, I so arrange and so design this circuit closing member that it may be op-' erated by a particular movement of the hand in respect to the wr st. Preferably, this movement is a backward bending of the hand such as would be convenient or natural in indicating to a car in the rear that you intend to stop. 'As shown, the

' have the strap M-tightened so as to hold the battery against-any sliding movement by the wrist such as would prevent the backwardfbendingof the hand from elos-' ing the circuit, there may be provided additional securing means for preventing this sliding. movement. F or instance, avery narrow strap or cord 22 may have a loop at one end through which the middle finger may extend andat the other end may be secured to the strap as shown in Figs. 2 and 3. This might, for instance, be in the form of a small cord so that the distance between i the loop and the point of attachment to the strap 14 could be varied at will to suit the convenience of the'wearer.

Insome commercial batteries as ufactured there is a contact member similar in most respectsto the contact -member 20 and an additional contact. member along one side andwith which the 'push button may engage. .In sucbconstructions, this servefasa spring for holding the battery at the endof the casing and preventing it iroin. accidentally shifting toward the push button 21'. It is, of course, evident that such spring contact would have to be insulated from the outer casing. v i 1 Although my improved device is primaother purposes. I 7 Having thus described my invention, what now manand. for use as a signal, .yet it will of cours'e be evident thatit may be used for various I claim as new and desire to secure by Lettors Patent is: v

, 1'. In combination, atwo-p'art casing, said parts having telescoping peripheral -walls,

a strap for-holding said partstoget-herand" for securing said casin in position, anYeIecQ trie light carried by the outer wall of one .50

casing part, and a push-button carried by the end wall ofthe other casing part, and a battery within said casing. J

"2. In combination, a'casing adapted to be secured to and supported by the back of the hand, an electric battery therein, an electric light on the side of the casmgaway from the hand, and a plunger at the upper end of the casing and movable inthe general direction ofthe length of the casing and adapted to be operatedb'y enga ement with the wrist upon a rearward bending of, the hand in respect tothe wristto close the circuit. 7 3.111 combination, a two part casingadapted to receive a battery, said parts hair- .ing telescoping peripheral walls, a strap last contact member may be bent over and light carried by said casing, and acircllit closer therefor.

Signed at New York city in the county of New York and State of New York this 23d day of July, A. D. 1917.

LESTER'PRAHAR. 

